Skill's weekend teaser

This is a discussion on Skill's weekend teaser within the General Trading Chat forums, part of the Reception category; The Dirty Great Big Engines That Always Make A Plane Fly!!!!!!!!!!
Do You Understand Aoifhpsadfhu Sacfnisbwesuf@#hf@#jf@8...

NO. Never flown multi-engine. I just 'treated myself' to a PPL 7 years ago and fly fairly regularly still. I reckon that puts me in the 5% most likely to at least be aware of the physical realities and practicalities of aerodynamic flight.

Maybe so, but it does not put you in the 38(ish)% that actually understand the nature - and solution - to the problem.

What will it take to make you substitute your position (that it won't take off) with the correct one (that it will)? Will you claim you are correct until you see, at first hand, a 747 actually take off from a treadmill?

|So, let's pretned the wheels are merely used to determine the speed of the plane over the surface of the conveyor. If the conveyor is always moving at the same speed, but in an opposite direction to the wheels, regardless of the speed, the net forward motion of the plane relative to the ground upon which the conveyor is standing is 0 mph. Have I got that right?

If I have, where does the 180 mph breeze necessary to provide sufficient lift to loft the bastie upward come from?

Seriously, from the engine.

Game, set and match. This perfectly encapsulates, and answers, the problem. You lose.

AH! So you think if you bung the brakes on full at the start of the runway, wang the thrust up to max and wait till the engines pump 180 mph airstream over the entire length of both wings it'll simply lifr off? Matey, the engines can't pump that much air over the wings, even if they were in front of them - LOL.

The engines provide thrust to move the plane which luckily has wings attached. It is the movement through the air of the wings that generates the lift. Strewth.

Bloody 747 VTOL under Captain Skills. I really want to see you try that one.

WHO IS PUTTING BRAKES ON ANYWHERE YOU COMPLETE AND UTTER MUPPET. Stop skirting the issue at hand, you are WRONG, WRONG, WRONG. Fifty2Aces has just confirmed also, you are outgunned, outmatched and outwitted mate.

Brakes add friction, which counteract the forward motion. A CONVEYOR BELT DOES NOT. YOU ARE A FOOOOOOOOOOOOOOOOOOOOOOOL

I don't understand how I can ask (multiple times) if my reasoning that the relative ground speed is 0 mph can go so magnificently unanswered.

If my rationale is wrong in that department then my reasoning which follows from that on airspeed also potentially falters and I'll be prepared, subject to a sensible refutation of that rationale, to review my thinking.

Small brakes would not stop it from taking off. Dirty great big ones, ones like you described, would. But that is a completely different kettle of fish! A conveyor belt moving opposite to motion is not a 'brake' of any kind, because it does not impart direct force on the plane, it's frictional force is translated into rotational movement of the plane's wheels, ABOUT THEIR AXES - NET MOTION DUE TO THIS IN EITHER DIRECTION ZERO!!!!!

YOu cannot understand this, because you lack the brainpower. end of story.

You nailed the lid on your own coffin in that post above, I owned you, and now you want to talk about brakes, which is like saying 'ooh but what if the engines on the plane were busted, HA then it couldn't take off could it?'

I don't understand how I can ask (multiple times) if my reasoning that the relative ground speed is 0 mph can go so magnificently unanswered.

If my rationale is wrong in that department then my reasoning which follows from that on airspeed also potentially falters and I'll be prepared, subject to a sensible refutation of that rationale, to review my thinking.

The point is that if the wheels can spin freely while the relative ground speed is 0, they can also spin freely (though slightly faster) while the plane is moving relative to ground.